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A sample of an unknown metal has a mass of 35.4 g and a volume of 3.11 cm3. Calculate

Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro ISBN: 9780321910295 34

Solution for problem 95P Chapter 2

Introductory Chemistry | 5th Edition

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Introductory Chemistry | 5th Edition | ISBN: 9780321910295 | Authors: Nivaldo J Tro

Introductory Chemistry | 5th Edition

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Problem 95P

Problem 95P

A sample of an unknown metal has a mass of 35.4 g and a volume of 3.11 cm3. Calculate its density and identify the metal by comparison to Table 1.

Table 1 Densities of Some Common Substances

Substance

Density (g/cm3)

charcoal, oak

0.57

Ethanol

0.789

Ice

0.92

water

1.0

glass

2.6

aluminum

2.7

titanium

4.50

iron

7.86

copper

8.96

lead

11.4

gold

19.3

platinum

21.4

Step-by-Step Solution:
Step 1 of 3

Solution 95P

Table 1 Densities of Some Common Substances

Substance

Density (g/cm3)

charcoal, oak

0.57

Ethanol

0.789

Ice

0.92

water

1.0

glass

2.6

aluminum

2.7

titanium

4.50

iron

7.86

copper

8.96

lead

11.4

gold

19.3

platinum

21.4

In this question it has been given that the mass of unknown metal is 35.4 g and volume is 3.11 cm3.

We have to calculate the density of the unknown metal.

It is known that density (d) =

Hence d = = 11.382 g/cm3

Thus the density of the unknown metal is found to be 11.382 g/cm3

The density of lead in the above table is given as 11.4, hence the obtained density (11.382) is nearly equal to the given  density.

Thus the unknown metal is assumed to be lead.

Step 2 of 3

Chapter 2, Problem 95P is Solved
Step 3 of 3

Textbook: Introductory Chemistry
Edition: 5
Author: Nivaldo J Tro
ISBN: 9780321910295

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A sample of an unknown metal has a mass of 35.4 g and a volume of 3.11 cm3. Calculate